Linux net/sched act_csum buffer overflow

The vulnerability of the tcfcsumact function in the net/sched/actcsum.c module of the network/sched subsystem of the Linux operating system is related to the improper checking of the specified index, position, or offset in the input data. Exploiting this vulnerability may allow a remote attacker ...

CVE-2026-31684

In the Linux kernel, the following vulnerability has been resolved: net: sched: actcsum: validate nested VLAN headers tcfcsumact walks nested VLAN headers directly from skb-data when an skb still carries in-payload VLAN tags. The current code reads vlan-hvlanencapsulatedproto and then pulls...

PT-2026-35144

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the tcf csum act function where nested VLAN headers are processed directly from skb-data when a socket buffer still contains in-payload VLAN tags. The system reads vlan-...